On Jun 11, 12:53*am, Richard Clark wrote:
On Thu, 10 Jun 2010 14:52:21 -0700 (PDT), K1TTT
wrote:

real
loads often change impedance with frequency

Real loads also change Z with power - especially dummy loads. *As a
real load has some trait of dummy load in it (loss) the degree of Z
change is in the degree of temperature change.

73's
Richard Clark, KB7QHC

yeah, but thats usually a much slower process... unless you get to a
point where it flashes over the insulation!